rayParams = {
    sourceOffset: new THREE.Vector3(),
    destOffset: new THREE.Vector3(),
    radius0: 4,
    radius1: 4,
    minRadius: 2.5,
    maxIterations: 7,
    isEternal: true,

    timeScale: 0.7,

    propagationTimeFactor: 0.05,
    vanishingTimeFactor: 0.95,
    subrayPeriod: 3.5,
    subrayDutyCycle: 0.6,
    maxSubrayRecursion: 3,
    ramification: 7,
    recursionProbability: 0.6,

    roughness: 0.85,
    straightness: 0.6
};
lightningColor = new THREE.Color( 0xFFB0FF );
lightningStrike = new LightningStrike( rayParams );
lightningMaterial = new THREE.MeshBasicMaterial( { color: lightningColor } );
lightningStrikeMesh = new THREE.Mesh( lightningStrike, lightningMaterial );
scene.add( lightningStrikeMesh );
